JP2018147550A - Optical disc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disc capable of obtaining information regarding a state of each optical disc or the like, even when the optical disc cannot be obtained directly.SOLUTION: An optical disc device includes: a control unit that acquires an access result when the optical disc is optically accessed by an optical disk drive unit for optically accessing the optical disc, and information regarding an access position (defect position) on the optical disc; and a storage unit for storing the information acquired by the control unit.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to an optical disc apparatus that records information on an optical disc.

  Recording of information on an optical disk and reading of information from an optical disk are generally performed using an optical disk device. At this time, if dust or scratches adhere to the information recording surface of the optical disc, there is a possibility that information is not written or read normally.

  Patent Documents 1 to 3 disclose techniques for displaying the positions and shapes of dust and scratches attached to the recording surface of an optical disc in an easy-to-understand manner.

JP 2008-262624 A JP 2008-234695 A Japanese Patent Laid-Open No. 10-027448

  In the prior art documents shown above, it is possible to analyze the optical disk by obtaining the optical disk in question and display the shape of dust, scratches, etc. attached to the recording surface in an easy-to-understand manner.

  However, in terms of industrial use, an optical disc to be analyzed is not always available. For example, there may be a case where the optical disc is not provided to an analyst who is a third party because of the confidentiality of information recorded on the optical disc.

  In view of the above-described problems, the present disclosure aims to obtain information on the state and the like of each optical disk even when the optical disk as a recording medium cannot be obtained directly.

  An optical disc apparatus according to an aspect of the present disclosure includes a control unit that acquires an access result when an optical disc drive unit that optically accesses an optical disc optically accesses the optical disc, and information on an access position on the optical disc, A storage unit that stores information acquired by the control unit.

  According to one aspect of the present disclosure, even when an optical disc to be analyzed cannot be obtained, information on the state of the optical disc and the like can be obtained.

The figure which shows the constitution of the optical disk device Block diagram of control unit in optical disc apparatus Diagram showing the structure of the magazine The figure which shows the composition layer of the optical disk The figure which shows the example of the optical disk which has a crack in a recording surface The figure which shows the example of information hold | maintained at a memory | storage part A diagram showing an example of connection between an optical disk device and an analyzer Diagram showing output example displayed by analyzer

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The inventor (s) provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is intended to limit the subject matter described in the claims. Not what you want.

(Embodiment 1)
FIG. 1 is a diagram showing a configuration of an optical disc apparatus. In the present embodiment, the lower left side in FIG. 1 is referred to as “device front”, and the upper right side in FIG. 1 is referred to as “device rear”.

  The optical disc apparatus 100 according to this embodiment includes two magazine stockers 101. The two magazine stockers 101 are provided on the bottom chassis 108 so as to face each other in the apparatus width direction Y. In FIG. 1, illustration of one (front side) magazine stocker 101 is omitted. Moreover, in FIG. 1, illustration of the top plate and the partition plate of the magazine stocker 101 is omitted.

  Each magazine stocker 101 stores a plurality of magazines 102. Each magazine 102 has a magazine tray 111 for storing a plurality of (for example, 12) optical disks. Between the two magazine stockers 101, there is provided a picker 103 that pulls out the magazine tray 111 from one magazine 102 selected from the plurality of magazines 102 and holds the magazine tray 111.

  The picker 103 is configured to convey the held magazine tray 111 to the vicinity of a plurality of optical disk drive units 104 arranged at the rear of the apparatus. The picker 103 is integrally provided with a lifter 105 that pushes out a plurality of optical disks from the magazine tray 111.

  The optical disc drive unit 104 is a device that records or reproduces information on an optical disc. The optical disk drive unit 104 is a tray type optical disk drive unit that loads an optical disk using a tray. The plurality of optical disk drive units 104 are stacked in the apparatus height direction Z, and are arranged adjacent to each magazine stocker 101 at the rear of the apparatus. A carrier 106 is provided between a plurality of optical disk drive units 104 stacked adjacent to one magazine stocker 101 and a plurality of optical disk drive units 104 stacked adjacent to the other magazine stocker 101. Yes.

  In the example of FIG. 1, the optical disk apparatus 100 will be described below as including six optical disk drive units 104 on one side and twelve optical disk drive units 104 as a whole.

  The carrier 106 holds a plurality of optical discs pushed out by the lifter 105 in a stacked state, separates one optical disc from the plurality of held optical discs above a tray ejected from an arbitrary optical disc drive unit 104, One separated optical disk is placed on the tray.

  A control unit 107 is provided further behind the carrier 106 and the plurality of optical disk drive units 104. FIG. 2 is a block diagram of the control unit 107 in the optical disc apparatus 100. The control unit 107 includes a control unit 120 that controls the operation (such as a motor) of each device such as the picker 103, the optical disc drive unit 104, and the carrier 106, and a power source (not shown). The control unit 120 includes a CPU or MPU, and realizes a predetermined function by executing a control program. The control unit 107 further includes a storage unit 121 that holds various types of information. The storage unit 121 is realized by a volatile or non-volatile memory or a recording module such as an HDD.

  The optical disc drive unit 104 detects dust or scratches on the optical disc. The control unit 120 acquires information such as dust and scratches on the optical disc from the optical disc drive unit 104 and stores the information in the storage unit 121.

  The control unit 107 is connected to, for example, a host computer that manages data or an optical disk analyzer described in the present embodiment. Based on the operator's instruction, the host computer sends a command to the control unit 107 to perform an operation such as writing or reading data to or from the designated magazine 102. The analysis device analyzes dust and scratches attached to the recording surface of the optical disk based on the information collected from the optical disk device 100 and displays the state in an easy-to-understand manner for the user. The control unit 107 controls the operation of each device such as the picker 103, the optical disc drive unit 104, and the carrier 106 in accordance with commands from the host computer, the analysis device, and the like.

  The magazine stocker 101 is provided along a guide rail 109 that slidably guides the picker 103. The guide rail 109 is provided so as to extend in the apparatus depth direction X (longitudinal direction of the magazine stocker 101). A handle 110 is provided on the side surface of the magazine stocker 101 on the front side of the apparatus. By pulling the handle 110, the magazine stocker 101 can be moved forward of the apparatus. Each magazine stocker 101 includes a partition plate (not shown) formed in a lattice shape when viewed in the apparatus width direction Y. The magazines 102 are stored in the respective spaces surrounded by the partition plates.

  The picker 103 includes a traveling base 112. A carriage (not shown) that slidably moves on the guide rail 109 is attached to one magazine stocker 101 side of the traveling base 112. A roller (not shown) is attached to the other magazine stocker 101 side of the traveling base 112.

  The turntable 113 is provided with a pair of elevating rails 114 extending in the apparatus height direction Z and facing each other. A lifting platform 115 is provided between the pair of lifting rails 114. Further, the rotary table 113 is provided with an elevator motor (not shown) that generates a driving force for moving the elevator 115 up and down.

  The elevator 115 is provided with a chuck 116 that has a mechanism for opening and closing a pair of hooks (not shown) that can be engaged with the engaging recesses of the magazine tray 111 and that moves back and forth. The pair of elevating rails 114 are attached to both side surfaces of the U-shaped angle 117.

  The input / output device 118 is an interface for allowing a user who uses the optical disc apparatus 100 to instruct the optical disc apparatus 100 or confirm the output from the optical disc apparatus 100. Specifically, a keyboard or a mouse is shown as a representative example of a device for instructing the optical disc apparatus 100, and a display or the like is shown as a representative example of a device for confirming the output from the optical disc apparatus 100.

  In the present embodiment, the device is not specified as long as the user functions as an interface to the optical disc apparatus 100, and devices other than those described above may be used. A device that gives an instruction to the optical disc apparatus 100 can be regarded as an input unit. A device for confirming the output from the optical disc apparatus 100 can be regarded as a display unit.

  In the above description, from the magazine 102 stored in the magazine stocker 101 using the picker 103, the lifter 105, the carrier 106, the guide rail 109, the traveling base 112, the rotating base 113, the lifting rail 114, the lifting base 115, the chuck 116, and the like. The specific example in which the optical disk is transported to the optical disk drive unit 104 has been described. However, the content of the present disclosure is not limited to this. It may be transported from the magazine 102 to the optical disc drive unit 104 by other methods.

  FIG. 3 is a diagram showing the configuration of the magazine 102. A plurality of optical discs 300 are laminated in the thickness direction to form a plurality of laminated optical discs 204. The plurality of stacked optical disks 204 are stored in the magazine tray 111 in that state. The number of stacked optical disks 300 may be any number. The magazine tray 111 has a core rod 202 that is inserted into the center hole of a plurality of stacked optical disks 204. The core rod 202 holds a plurality of stacked optical disks 204 and suppresses each optical disk 300 from moving in the surface direction. A magazine tray 111 holding a plurality of stacked optical disks 204 is stored in a tray holder 203. The magazine 102 is configured by both the magazine tray 111 and the tray holder 203.

  FIG. 4 is a diagram showing the constituent layers of the optical disc 300. The optical disc 300 is composed of three main layers: a substrate layer 301, an A-side recording layer, and a B-side recording layer. The substrate layer 301 is a layer serving as a base of the optical disc 300, ensures the mechanical strength of the entire optical disc 300, and supports the recording layers on the A side and the B side.

  Both the A-side recording layer and the B-side recording layer are recording layers for recording information on the optical disc 300. Each of the recording layer on the A side and the recording layer on the B side has three recording layers. On the A side, there are an L0 layer 302, an L1 layer 303, and an L2 layer 304 from the substrate layer 301 side. On the B surface side, similarly, there are an L0 layer 305, an L1 layer 306, and an L2 layer 307 from the substrate layer 301 side.

  In this embodiment, the case where three recording layers are held for both the A-side and B-side recording layers will be described as an example. However, the contents of the present disclosure are not limited to this. It may have four or more recording layers, or may have two or less recording layers. Further, in the above description, the case where the optical disc 300 has recording layers on both the A side and the B side has been described as an example, but the content of the present disclosure is not limited to this. It may be an optical disc 300 having a recording layer only on one side. Further, the number of recording layers on the A side and B side may be different.

  The names “A side” and “B side” are used for the sake of explanation, and are not limited to these names. Any identification means may be used as long as it has recording layers on both sides in the thickness direction of the optical disc 300 with the substrate layer 301 as the center and distinguishes the respective surfaces.

  The optical disc 300 has guide grooves for recording information on the respective recording layers in the L0 layer 302, the L1 layer 303, the L2 layer 304, the L0 layer 305, the L1 layer 306, and the L2 layer 307. When this guide groove is formed, the surface closer to the laser light incident side on both the A side and the B side is called “groove”, and the far side is called “land”. By recording information on both the groove and the land, the recording density of information on the optical disc 300 can be increased.

  FIG. 5 is a diagram showing an example of an optical disc having a scratch on the recording surface. FIG. 5 illustrates a case where there is dust or scratches 401 on the outermost L2 layer 307 on the B surface side of the optical disc 300.

  If scratches, dust, or the like is attached to the recording layer on which information is recorded, the optical disc apparatus 100 cannot record information on the portion or read information. More specifically, since the light beam for recording information on the optical disc 300 is not sufficiently irradiated to a predetermined recording layer of the optical disc 300 due to dust or scratches 401, the recording mark is not formed correctly. Alternatively, the beam light for reading information from the optical disc 300 is not reflected as expected due to dust or scratches 401 and the reflected light cannot be obtained sufficiently. This makes it impossible to record or read information.

  The optical disc drive unit 104 irradiates the inserted optical disc 300 with laser light. The laser beam reflected on the optical disc 300 is converted into an electric signal by the light receiving unit of the optical disc drive unit 104. Evaluation values such as iMLSE (Integrated-Maximum Likelihood Sequence Estimation) can be used based on the RF signal generated from the electrical signal. The evaluation value is affected by a portion where dust or scratches 401 are present on the optical disc 300. Based on the evaluation value, the state of the optical disc 300 can be determined.

  It should be noted that a method other than the above iMLSE may be used for detecting 401 such as dust or scratches. For example, an evaluation value based on SER (Symbol Error Rate) may be used. Further, an evaluation method such as an evaluation value based on servo signals such as a focus error signal and a tracking error signal acquired for control in order to optically access the optical disc 300 and an evaluation method such as BDO (Black Dot Out) are used. May be. The present disclosure does not disclose a new technique for a specific evaluation method. The content of the present disclosure can be realized by using various known evaluation methods.

  By using a plurality of different evaluation methods, it is possible to identify the type of error that occurs in the optical disc 300. For example, it is understood that an address signal formed in advance on the optical disc 300 such as a pit or wobble cannot be obtained by using the evaluation value of the focus error signal or tracking error signal. In addition, although a focus error signal and a tracking error signal can be acquired, but other evaluation values are bad, a signal mark configured on the optical disc is not appropriately configured, or a recording layer on which the mark is formed It can be seen that the quality of the product may be low. That is, it is possible to obtain an outline of the type of error or the like occurring in the optical disc 300 by using the evaluation values obtained by the plurality of evaluation methods.

  Further, although the time point at which the optical disk 300 is evaluated is not specified in the present disclosure, there are several evaluation timings. For example, for a new optical disc 300 on which data has not yet been recorded, the entire recording surface may be evaluated (inspected) once before data recording. Further, when a recording error or a reproduction error occurs when data is recorded on the optical disc 300 or when data is read from the optical disc 300, an evaluation value is acquired by a predetermined inspection method for that portion. There may be. In another example, an instruction may be received from an external host device connected to the optical disc apparatus 100 and the optical disc 300 may be inserted into the optical disc drive unit 104 for inspection.

  For example, when a new unrecorded optical disc 300 is inserted, the optical disc drive unit 104 evaluates all recording areas once before recording data or the like on the optical disc 300. This makes it possible to determine whether dust or scratches attached to the optical disc 300 existed before delivery of the optical disc 300, or occurred after delivery. In addition, by evaluating the optical disc 300 when an error occurs during data recording to or reading from the optical disc 300, it is possible to identify at which stage dust or scratches occur after delivery of the optical disc 300. In addition, the inspection of the optical disc 300 in response to an instruction from the host computer enables the optical disc 300 to be evaluated at any necessary timing. In other words, by performing the inspection of the optical disc 300 at various timings, it is possible to identify the timing at which the error of the optical disc 300 has occurred.

  FIG. 6 is a diagram illustrating an example of information stored in the storage unit 121. The information illustrated in FIG. 6 is information related to the access result to the optical disc 300 acquired from the optical disc drive unit 104 by the control unit 120. The control unit 120 holds these pieces of information in the storage unit 121. Below, the kind of information hold | maintained at the memory | storage part 121 and its content example are demonstrated.

  In this specification, the term “defect” refers to the optical disc 300 in which a mark for recording information on the optical disc 300 cannot be normally formed, or a mark recorded for reading information from the optical disc 300 cannot be normally identified. This means a case where physical access cannot be performed normally. The meaning is different from a “defect” referred to as a “defect cluster” or the like when data cannot be normally recorded / read in a cluster unit using ECC (Error Correcting Code) in the technical field of the optical disc 300. In this specification, when “defects” are intended in units of predetermined clusters using ECC or the like, they are explicitly described separately as “defect clusters”.

  The information acquisition date and time 501 is date and time information when the control unit 120 or the optical disc drive unit 104 evaluates 401 such as dust or scratches.

  By providing the information acquisition date 501, the information analyst can specifically specify when the evaluation is performed on the optical disc 300.

  The optical disk device identifier 502 is information for identifying the optical disk device 100 including the optical disk drive unit 104 that has performed evaluation on the optical disk 300. The information for identifying the optical disk device 100 is composed of both the product number and serial number of the optical disk device 100, for example.

  By providing the optical disk device identifier 502, an information analyst can specifically identify which optical disk device 100 has been evaluated for the optical disk 300.

  The magazine type 503 is information for identifying the type of the magazine 102 that has stored the evaluated optical disk 300. Specifically, the product number of the magazine 102 can be used as this information.

  The maximum number of optical disks 300 that can be held by the magazine type 503 can be specified. In addition, this information makes it possible to specify in which type of magazine 102 the evaluated optical disc 300 was stored.

  The magazine identifier 504 is information for identifying the magazine 102. For example, the serial number of each magazine 102 can be used as this information.

  By using the magazine type 503 and the magazine identifier 504, it is possible to uniquely specify the magazine 102 in which the evaluated optical disc 300 is stored.

  The magazine storage position 505 is information indicating where the magazine 102 storing the evaluated optical disc 300 is stored in the magazine stocker 101 shown in FIG.

  Thereby, the position of the magazine stocker 101 in which the magazine 102 that has stored the evaluated optical disk 300 is actually stored can be specified.

  The number of optical disks 506 is information indicating the number of optical disks 300 actually stored in the same magazine 102 as the evaluated optical disk 300. For this information, for example, the number of optical disks 300 carried by the carrier 106 from the magazine 102 is calculated, or the picker 103 reads out an RFID (not shown) that is attached to each magazine 102 and holds various information of the magazine 102. It can be obtained at.

  By providing the number of optical disks 506, the information analyst can specify how many optical disks 300 are actually stored in the magazine 102.

  The optical disk type 507 to NoY defect position (logical position) 517 in FIG. 6 described below is information regarding the first optical disk 300 stored in the magazine 102.

  The optical disc type 507 is information indicating the type of the first optical disc 300. If there is a product number, it may be used as the information. Depending on the type of optical disc 300, the number of recording layers, recording method (for example, recording on land, recording on groove, recording on both land and groove, etc.), recording capacity, etc., differ depending on the type. . The optical disc type 507 is information for identifying these types.

  By providing the optical disc type 507, the information analyst can specify the type of the optical disc 300 that has been evaluated.

  The optical disc identifier 508 is information for identifying each optical disc 300. The serial number of the optical disc 300 can be used as this information, for example. Since the serial number and the like of the optical disc 300 are generally recorded in a BCA (Burst Cutting Area) of the optical disc 300, the optical disc drive unit 104 can obtain it by reading this area.

  By providing the optical disc identifier 508, the information analyst can identify the individual of the optical disc 300 that has been evaluated.

  The inserted drive identifier 509 is information for specifying the optical disc drive unit 104 in which the evaluated optical disc 300 is inserted. The optical disc apparatus 100 as illustrated in FIG. 1 includes a plurality of optical disc drive units 104.

  The inserted drive identifier 509 can identify which optical disk drive unit 104 has evaluated the optical disk 300, for example, when the optical disk apparatus 100 includes a plurality of optical disk drive units 104.

  The defect number 510 is information indicating the number of defects detected on the same optical disc 300. This is information indicating the number of defects detected in the optical disc 300 by the optical disc drive unit 104 in which the optical disc 300 is inserted. The optical disk drive unit 104 may specify the defect number 510 information by inspecting all recording areas of the optical disk 300. As another method, the optical disc drive unit 104 may specify the total number of defects detected as the defect count 510 when executing access to the recording area instructed by the control unit 120 or the like. Good.

  By providing the defect number 510, the information analyst can specify how many defects are recognized in one optical disc 300.

  In general, when the recording area of the optical disc 300 is defective, information that should have been recorded in the defective area is recorded in another recording area. This area where information is recorded alternatively is called a substitute area. The alternative area is prepared in advance on the optical disc 300. The alternative area remaining amount 511 is information indicating the remaining remaining amount of the alternative area provided in advance.

  By providing the alternative area remaining amount 511, the information analyst can grasp the remaining amount of the alternative area provided on the optical disc 300. The alternative area remaining amount 511 indicates how many defects can be dealt with in the optical disc 300.

  The No1 defect position (physical position) 512 to NoY defect position (logical position) 517 are for each of Y defects indicated by the number of defects 510 recognized on the first optical disc 300 stored in the magazine 102. Show detailed information.

  The No. 1 defect position (physical position) 512 is information indicating the physical position on the optical disc 300 for the first defect detected on the first optical disc 300. As information indicating the physical position, for example, a physical address that is uniquely set at each recording position of each recording area of the optical disc 300 may be used. If the physical address is specified, the position on the optical disc 300 corresponding to the physical address can be specified.

  In addition to the physical address, the recording surface information indicating which recording surface is on the A side or B side, the recording layer information indicating which recording layer is the L0 to L2 layer, and the groove for specifying the land or groove Other position specification using physical configuration information such as information, radius information indicating a track position, and phase angle information indicating a sector position may be used. These pieces of information are information used for controlling a module such as an optical pickup when the optical disc drive unit 104 accesses the optical disc 300.

  By providing the No. 1 defect position (physical position) 512, the information analyst can specify the position of the defect generated in the optical disc 300.

  The No 1 defect position (logical position) 513 is information indicating the position on the optical disc 300 for the first defect detected on the first optical disc 300, as in the No 1 defect position (physical position) 512. The No1 defect position (logical position) 513 is different from the No1 defect position (physical position) 512 in that the position information is expressed as logical position information.

  When the position information of the recording area of the optical disc 300 is indicated as logical position information, the recording area of the optical disc 300 is regarded as one continuous logical space, and a logical address uniquely assigned in the logical space and an alternative if necessary Use the information of the specified area. Thereby, the position on the optical disc 300 is specified.

  By providing the No1 defect position (logical position) 513, the information analyst can specify the position of the defect generated in the optical disc 300 in the same manner as the No1 defect position (physical position) 512.

  In the present embodiment, the case where both the No1 defect position (physical position) 512 and the No1 defect position (logical position) 513 are acquired is shown as an example, but the content described in the present disclosure is limited to this. Is not to be done. Only one of the information may be used.

  In the above example, the main purpose is to record only the defective part. However, the content of the present disclosure is not limited to this. For example, if a defect is detected on one of the groove tracks or land tracks, the other land track or groove track adjacent in the radial direction of the track is also inspected, and information on the inspection results is recorded together. You may keep it.

  A similar idea is that, for example, when a defect is detected in the L0 layer or the like, a defect such as the L1 layer or the L2 layer exists in a portion corresponding to the substantially same radius and phase angle position as the defect position in the L0 layer. The recording layer positioned on the laser beam incident side of the recording layer may also be inspected and information on the inspection result may be recorded.

  In this way, the analysis can be performed in more detail by inspecting and recording not only the defective portion but also the highly related portion such as the peripheral portion of the defect.

  The No. 2 defect position (physical position) 514 and the No. 2 defect position (logical position) 515 are the same as the No. 1 defect position (physical position) 512 and the No. 1 defect position (logical position) 513. The position information for the second defect of the optical disc 300 is shown. Details are the same as those of the No. 1 defect position (physical position) 512 and the No. 1 defect position (logical position) 513, and thus the description thereof is omitted.

  Similarly, up to the Y-th defect indicated by the number of defects 510, each defect position can be indicated using a physical position and a logical position.

  Also, when the evaluation is performed on the second and subsequent optical disks 300 stored in the magazine 102, information can be recorded by the same method as the optical disk type 507 to NoY defect position (logical position) 517 described above. it can. The ordinal numbers of the first and second sheets are based on, for example, the stacking order of the optical disks 300 in the magazine 102. Specifically, each of the optical disks 300 stacked in the magazine 102 has a unique serial number in order from the top. Thereby, it is possible to specify in which position in the magazine 102 the optical disc 300 is stored.

  In the example of FIG. 6, an example in which the information on the optical disk storage position indicating in which position of each optical disk 300 is stored in the magazine 102 can be determined from the relationship between a plurality of information recorded in the storage unit 121 is shown. . However, the present embodiment is not limited to this content. Information on the optical disk storage position indicating where each optical disk 300 is stored in the magazine 102 may be directly indicated.

  FIG. 6 illustrates a method of recording information evaluated on the optical disk 300 stored in the magazine 102 as a management unit. However, the contents described in the present disclosure are not limited to this. The evaluation information of the optical disc 300 may be recorded in units of the optical disc 300. In that case, for example, the contents are as shown in FIG. The same reference numerals are assigned to items similar to those in FIG. 6, and detailed description thereof is omitted.

  Information newly included in FIG. 7 includes an optical disk storage location 605. The optical disk storage position 605 is information indicating the position where the evaluated optical disk 300 is stored in the optical disk device 100. This information includes, for example, identification information of the magazine 102 that stores the evaluated optical disk 300, position information indicating in which position the optical disk 300 is stored in the magazine 102, and where in the magazine stocker 101 And position information indicating whether or not 102 is stored. As another example, there is a method in which identification numbers corresponding to the respective storage positions are uniquely assigned to all the optical disks 300 in the optical disk apparatus 100, and the storage positions are specified by the identification numbers.

  The information recorded and stored in the storage unit 121 is not limited to the information shown in FIGS. For example, if the number of defective clusters to be replaced is known from the size of the replacement area of the optical disk 300 allocated first, such as the replacement area remaining amount 511, information corresponding to the replacement area remaining amount 511 can be calculated. . When acquiring such information, it is not always necessary to record and save all the information shown in FIGS. 6 and 7 in the storage unit 121. As long as equivalent information can be calculated based on other information, the information need not be included in the information recorded or stored in the storage unit 121.

  Moreover, although the method of recording the position etc. of the defect detected by the evaluated optical disk 300 was demonstrated in the example of FIG.6 and FIG.7, the content described in this indication is not limited to this. For example, when the entire optical disc 300 is inspected with respect to the unrecorded optical disc 300, all evaluation values (for example, optical access results such as the magnitude of the received light signal) acquired in all of the inspected areas are recorded. It may be a thing. By recording the results for the entire area thus inspected, it is possible to grasp the situation of the entire optical disc 300.

  Further, in the examples of FIGS. 6 and 7, the case where the position where the defect occurs is directly recorded is described as an example, but the contents described in the present disclosure are not limited to this. For example, when evaluating a specific area in accordance with a predetermined rule among recording areas for recording data, the evaluation values obtained sequentially from the top of the specific area are recorded to relatively The position on the optical disc 300 can be identified. Therefore, you may specify each position indirectly like this.

  Here, the “specific region in accordance with a predetermined rule defined in advance” is, for example, a track that is spaced every m tracks from the nth track as a base point. If the processing time becomes long when all the recording areas are evaluated, the evaluation may be limited to the areas extracted from the recording areas based on a certain rule or the like.

  The above two examples are more effective when evaluating the entire data recording area of the optical disc 300, particularly when an unrecorded optical disc 300 is inserted into the optical disc drive unit 104.

  Moreover, although the method of recording the position where the defect has occurred has been described in the examples of FIGS. 6 and 7, the content described in the present disclosure is not limited to this. For example, not only the position where the defect occurs but also the evaluation value which is the optical access result at the defect position may be recorded together. Thereby, it is possible to identify the strength and the like of the defect. As such an access result, the above-described various evaluation values can be adopted. Specifically, iMLSE based on RF signal, evaluation value based on SER, evaluation value based on a servo signal such as a focus error signal or tracking error signal, evaluation value using an evaluation method such as BDO, Size, etc. One or a plurality of evaluation values may be recorded in the storage unit 121 as an access result.

  The control unit 120 saves information such as the defect acquired from the optical disc drive unit 104 or the access result of optical access to the optical disc 300 in the storage unit 121 as described above. The control unit 120 performs processing for transmitting information stored in the storage unit 121 to an analysis apparatus that analyzes the information. However, there are several methods for this processing depending on the situation in which the optical disc apparatus 100 is used.

  When the optical disk device 100 can electronically transmit information stored in the storage unit 121 to the analysis device through a communication line or the like, the control unit 120 converts the information stored in the storage unit 121 into a predetermined format or the like. The information is converted and transmitted to an analyzer or the like designated as electronic information. In this case, if necessary, a display to the effect that confirmation regarding the transmission of the information is requested may be displayed on the display unit of the optical disc apparatus 100 before transmitting the information.

  As another example, when the optical disc apparatus 100 cannot electronically transmit to the person in charge of analyzing the information through a communication line or the like, the control unit 120 stores information to be transmitted to the storage unit 121. Can be notified to the user of the optical disc apparatus 100 via the display unit. The control unit 120 may perform an encryption process or a process called a compression process to reduce the amount of information so that information stored in the storage unit 121 cannot be easily viewed by a third party.

  Information subjected to encryption processing, compression processing, and other predetermined processing is copied to a portable storage medium or the like, and the information is sent to the analysis apparatus by connecting the storage medium to the analysis apparatus. In this case, the optical disc apparatus 100 outputs information on which predetermined processing has been performed to these storage media.

  FIG. 8 is a diagram illustrating an output example displayed by the analyzer. Based on the information acquired from the optical disc device 100, the analysis device displays the defects of the optical disc 300 in an easy-to-understand manner. Specifically, a display corresponding to each defect position and shape is performed based on the shape of the optical disk 300. At this time, the size and color of each display may be changed according to the size of the defect, the amount of error that has occurred, and the content of the defect.

  In addition, the optical disc 300 described in this embodiment can record on both sides, and each side has a plurality of recording layers. Therefore, it is preferable that the recording surface and the recording layer are displayed independently so that the positional relationship between the recording surface and the recording layer can be easily understood in the output example of the analyzer. In the example of FIG. 8, defects recognized on different recording surfaces and recording layers of the same optical disc 300 are displayed in the horizontal direction.

  In addition, when the optical disc 300 to be inspected includes a plurality of recording layers, the analysis apparatus may automatically adjust the phase angle of each recording layer. For example, if dust or dirt adheres to the L2 layers 304 and 307 on the closest side where the laser beam is incident, a defect may be detected for the other recording layer on the inner side. In such a case, the analysis apparatus preferably adjusts and displays the phase relationship (positional relationship in the rotation direction) of each recording layer when displaying the result in FIG. Such adjustment can be performed by, for example, the technique described in Patent Document 1 and pattern matching of defect shapes in the case where the results detected in the respective recording layers are illustrated. The analysis device may have a function of displaying the defect display for each recording layer in an overlapping manner so that the user can adjust them, and further adjusting the display angle of each recording layer.

  Further, in the example of FIG. 8, the defect positions on the respective recording surfaces and recording layers are marked from the information obtained in the same manner for the other optical disks 300 included in the same magazine 102 in the vertical direction.

  When the analyzer performs such display, it becomes easy to grasp the defects in the respective recording surfaces and recording layers of the optical disc 300 stored in magazine units. Such a display method is useful particularly when there is dust or scratches associated with the storage position of the optical disc 300 or the like.

  For example, when a defect having a similar shape is detected at substantially the same position on adjacent recording surfaces of two optical discs 300 stored in adjacent positions of the same magazine 102, the two It can be inferred that there is a high possibility that dust or the like is caught in the optical disc 300.

  In the present embodiment, the case where the control unit 120 acquires information from the optical disc drive unit 104 for the evaluated optical disc 300 and stores the information in the storage unit 121 has been mainly described. However, the content of the present disclosure is not limited to this.

  For example, when a defect or the like is found in one optical disk 300 of a plurality of optical disks 300 included in a certain magazine 102, other optical disks 300 included in the same magazine 102 are also evaluated and information about them is acquired. Also good. In this case, when a defect cannot be detected in another optical disc 300, for example, the defect number 510 of each optical disc 300 described in FIG. 6 is set to “0” to clearly indicate that the optical disc 300 has no defect. It becomes possible to do.

  The above case is particularly useful when a plurality of optical discs 300 in the magazine 102 constitutes a RAID (Redundant Arrays of Inexpensive Disks). This is because, in RAID, information is redundantly recorded on a plurality of optical discs 300, so it is preferable to manage defect information across the plurality of optical discs 300 constituting the RAID.

  As shown in FIG. 1, when the optical disk apparatus 100 stores a plurality of magazines 102 in the magazine stocker 101, the magazine 102 is stored in the magazine stocker 101 in the information acquired and stored by the control unit 120 or the like in FIG. Information of a magazine storage position indicating which position is stored may be further provided.

  By providing the magazine storage position information, the storage position of the target magazine 102 can be specified.

  The technical contents described in the present disclosure can be used in an optical disc apparatus that records information on an optical disc.

DESCRIPTION OF SYMBOLS 100 Optical disk apparatus 101 Magazine stocker 102 Magazine 103 Picker 104 Optical disk drive unit 105 Lifter 106 Carrier 107 Control unit 108 Bottom chassis 109 Guide rail 110 Handle 111 Magazine tray 112 Traveling base 113 Rotating table 114 Lifting rail 115 Lifting table 116 Chuck 117 Angle 118 I / O Device 120 Control unit 121 Storage unit 202 Core rod 203 Tray holder 204 Stacked plural optical discs 300 Optical disc 301 Substrate layer 302 L0 layer 303 L1 layer 304 L2 layer 305 L0 layer 306 L1 layer 307 L2 layer 401 Dust or scratches 501 information Acquisition date and time 502 Optical disk device identifier 503 Magazine type 504 Magazine identifier 505 Magazine Paid position 506 optical sheets 507 disc type 508 disc identifier 509 inserted drive identifier 510 defects number 511 substitute area remaining 512 No1 defect position (physical location)
513 No1 defect position (logical position)
514 No2 defect position (physical position)
515 No2 defect position (logical position)
516 NoY defect position (physical position)
517 NoY defect position (logical position)
605 Optical disk storage location

Claims (8)

An optical disk drive unit that optically accesses the optical disk, and a control unit that acquires an access result when the optical disk is optically accessed and information on an access position on the optical disk;
A storage unit for storing information acquired by the control unit;
An optical disc device comprising: The control unit also acquires information on an optical disc identifier for identifying an optical disc inserted in the optical disc drive unit.
The optical disc apparatus according to claim 1. The optical disc is a part of a plurality of optical discs stored in a magazine as a set of a plurality of optical discs,
The control unit further acquires information on a magazine identifier for identifying a magazine in which the optical disk is stored, and information on an optical disk storage position indicating a position in which the optical disk is stored in the magazine.
The optical disc apparatus according to claim 2. The control unit further acquires information on a magazine storage position indicating a position in a magazine stocker in which the magazine is stored;
The optical disc apparatus according to claim 3. The control unit further acquires information on the remaining area of the alternative area of the optical disc.
The optical disc apparatus according to claim 2. The access position information is composed of information including recording surface information indicating a recording surface position on the optical disc, recording layer information indicating a recording layer position, a track number indicating a track position, and a sector number indicating a sector position. The
The optical disc apparatus according to claim 1. When an error occurs in optical access to a track on the optical disc, the control unit optically accesses a predetermined number of tracks adjacent to the track, and further acquires the access result.
The optical disc apparatus according to claim 1. When an error occurs in optical access to a recording layer of the optical disc, the control unit optically accesses another layer adjacent to the recording layer and further acquires the access result. ,
The optical disc apparatus according to claim 1 or 7.